Multipart: Send multiple files quickly

Is your feature request related to a problem? Please describe.
Sending multiple files is nice, but if we need to send hundreds or thousands of files it takes ages.

Describe the solution you'd like
Instead of selecting every single file by its own, I would like to select multiple files. Also it should be possible to rename all of them at once.

Describe alternatives you've considered
It could be easier to handle a multipart like one entry and attach an array of files to it.
{ "name": "file", "file": [] }

Additional context
Of course it's easy to write a quick script, that does this for you, but I'd love to handle all Http requests inside one environment.